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Short-term toxicity to fish

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Uronium hydrogen sulphate is of low acute toxicity to fish.
Uronium hydrogen sulphate readily degrades to urea and sulfuric acid and/or sulfate ions in the environment and these degradation products are considered in the assessment:
- For sulfates (as calcium salt): 96-hr LC50 > 100 mg/L (equivalent to 79 mg/L as anhydrous). No symptoms of intoxication were observed ;
- Urea is of very low acute toxicity to fish with 96hr LC50 values higher than 6810 mg/L.
It can be concluded that Uronium hydrogen sulphate and its degradation products are not acutely toxic to fish.

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